Glass-drawing apparatus.



H. G. SLINGLUFF.

GLASS DRAWING APPARATUS.

APPLICATION FILED DEO.19, 190s.

Patented Dec.3,1912.

WITNESSES pnrrnn s'rrrrns HARRY G. SLINGLUFF,- OF MOUNT VERNON,

rn rnnr orrron OHIO, ASSIGNOR TO PITTSBURGH PLATE SYLV'ANIA.

7 Specification of Letters Patent.

GLASS DRAWIN G APPARATUS.

Patented Dec. 3, 1912.

Application filed December 19, 19(18. Serial No. 468,261.

To allwhom it may concern.

B e it known that I, HARRY G. Smnonurr, acltlzen of the-United States,residing at Mount Vernon, in the county of ITlOX 2tI1Cl State of Ohio,have invented certain new i,

and usefullmprovements in Glass-Drawing Apparatus, of which thefollowing is a specification.

The invention relates to. apparatus employed in drawing glass, andparticularly to means for securing a proper temperature t in the upperportion. and neck of glass cylinders during drawing. The invention hasfor its primary objects; the provision of an improved means of thecharacter specified wherein the heat for the hood employed is 1 appliedfrom the molten glass itself; and the provision of improved meanswhereby the hood tor,- surrounding the neck of the cylinder isautomatically operated and withoutinterference with the bait or thecylinder being drawn. One embodiment of the invention is illustrated inthe accompanying drawings, wherein Figure 1 is a diagrammatic frontelevavation of the apparatus, with the bait in the position at. whichthe drawing starts,

Figure 2 is a similar view, but with the cylinder partially drawn,

Figure 3 is a side elevation of the apparatus as shown in Figure '2, I

Figure 4 is an enlarged detail section taken on the line IV-IV of Figure3,

Figure 5 is an enlarged detail section through the heating annulus orhood, and through the means for supporting such hood,

Figure 6 is an enlarged detail section at the lower end of thesupporting guide rod,

Figure 7 is a plan View of the stop bar, and

Figure 8 is an enlarged rear View of the mechanism for automaticallyopening the heating means or hood when it reaches its upper position.

Briefly stated the device comprises a metal hood which is mounted tomove with the bait during the drawing operation, and is designed duringthe starting operation to rest adjacent the glass and be heated to ahigh temperature. The heat thus stored in the annulus or hood issubsequently radiated against the upper portion and neck f th cylinderas it is drawn, maintaining {the glass at a higher temperature than 1would otherwise be the case, which condition results in less breakage atthis point, due to rapid cooling, and greatly facilitates f the drawingof long-cylinders. A lost inoition connection is provided with thecarriage of the bait, so that the hood is auto.- matically stopped atthe desired position" above the surface of the molten glass. A

tomatic means are also preferably supp.

upper position, so that the cylinder and the i bait may be withdrawnlaterally without inl terference with the hood.

Referring to the general arrangement of Figs. 1, 2 and 3, 1 is a body ofmolten glass from which the drawing is to take place; 2 is the baitprovided with the hollowhandle 3 for the admission of air; at is thereciprocatory carriage to which the bait is secured by means of the fork5, (Fig. 3) 6 is an air cylinder having connection with the end of thebait by means of the pipe 7; 8 is a pipe by means of which air issupplied to the cylinder 6; 9 are the guides upon which the carriage 4:travels; 10 is the cable by means of which the carriage is moved upward;and 11 is a vertical rod (Figure 3) secured to the carriage and uponwhich the hood is mounted in a manner which will now be described.

The hood is made in two sections 12 and cylinder as indicated in Figure'2, and composed of iron or other material capable of retaining heat fora considerable period. The sections 12 and 13 are provided with upwardlyextending brackets brackets are mounted upon bars 14 and 15. The bars 14and 1.5 are mounted respectively upon the collars 16 and 17 (Fig. 6)carried by the rod 11, and their rear ends are extended to form thehandles 18 and 19 by means of which the sections may be spread apart.-The collars 16 and 17 are not mount ed directly upon the rod 11' butarepivoted upon the collar 20 and are neldin position thereon by meansof the nut 21. pivotal to the position indicated. Figure 1, a

sections 12 and 13 for opening the hood when it reaches itscia slidingconnection is thus made between the.

13 shaped to fit about the upper end of the V 12', which to rest uponbrackets 23 secured to the guide 9. .A rod 22 passes through the lowerend of the rod 11 and is locked in position by the nuts 22 as indicatedin Figure 6. The front end 22 of this rod is forked and is adapted toengage the handle of the bait and steady it. It will be seen that whenthe hood sections and the collar 20 reach the position of Figures 1 and6, the stop bar 22 is arrested by the brackets'23, and the lower end ofsuch collar rests upon the stop bar 22, thus maintaining the hood inposition above the glass, while the bait, its steady bar 22 and the bar11 are free to descend so that-the bait contacts with the glass. Thesections 12 and 13 maintain the position indicated in Figure 1, untilthe bait reaches the position'indicated in Figure 2, at which time thenuts 22 on the rod 22 (Fig. 6)

engage the lower end of the collar 20, and the sections are carriedupward at the same rate of speed as the bait and the cylinder attachedtheretol their lowermost positions they become heated to a very hightemperature, due to their proximity to the molten glass. They may bespread apartif desired, to expose them more thoroughly to the heat fromthe glass below. A certain amount of this heat is retained throughoutthe drawing process, as the sections are made of heavy iron, and bytheir radiation the neck and upper portion of the cylinder aremaintained at such a temperature that a long cylinder may be drawnwithout danger of breakage. VVhe'n the extreme point of draw is reached,the handles 18 and 19 are engaged by'the forked member 24, (Fig. 8),which forked member cams the handles toward each other, thus spreadingthe sections 12 and 13 apart sufliciently to permit the lateral passageof the bait and cylinder support thereby.

Theupper edges of the sections 12 and 13 are preferably turned inwardabout the handle of the bait as indicated in Fig. 5 so that an upwardpassage of air between the sections and cylinder is prevented, and theheat fr0m the sections is maintained about the neck of the cylinderbeing drawn.

It is obvious that the shape and construction of the hood might beconsiderably modified without departing from the broad inventioninvolved. The lower edge of the hood might be extended up or down within6 glass member being drawn which is adjacent While the sections areinbait, 'and supported independently thereof and automatic means foropening the hood during its upward movement.

2. The combination with a bait and. carriage therefor for drawing glasscylinders, of'a vertical supporting rod upon the carriage, a metal hoodmember for the upper portion of the cylinder mounted slidably on therod, and means for stopping the downward movement of the said memberadjacent the surface of the glass from which the drawing occurs.

3. The combmation with a bait and carriage therefor for drawing glasscylinders,

of a vertical supporting rod upon the car-- riage, a pair of metalmembers for encircling the upper portion of the cylinder slidably andpivotally mounted on the rod, and means for stopping the downwardmovement of the said members adjacent the surface of the glass fromwhich the drawing occurs.

4:. The combination with a,bait and carriage therefor for drawing glasscylinders, of a vertical su porting rod upon the carriage, a pair 0metal members for enc rcling the upper portion of the cylinder slidablyand pivotally mounted on the rod and having rearwardly projectinghandles and means for stopping the downward movement of the said membersadjacent the surface of the glass'from which the drawing occurs.

5. The combination with a bait and carriage therefor for drawing glasscyhnders, of a vertical supporting rod upon the carriage, a pair ofmetal members for encir- 1 means for stopping the downward movement ofthe said members adjacent the surface of the glass from which thedrawing occurs, and camming means for engaging the said handles andspreading the sald members apart during the upward movement of thecarriage.

6. The combination with a bait and carriage therefor for drawing glasscylinders, of a vertical supporting rod upon the carriage, a pair ofhinged metal members for encircling the upper portion of the cylinderslidably mounted on the rod, means for stopping the downward movement ofthe members at a predetermined point during the upward travel of thebait. I v

7. In a device of theclass. described, the combination with a carriage,of a removable blow-pipe on said carriage, a hood on said carnage, andmeans for man1pulat1ng'sa1d hood toward and from'said blow-gipe.

; 8. In a device off the class described, the

combination with a carriage, of a blow pipe on said carriage; a hood onsaid carriage;

and automatic means for manipulating said hood toward and from saidblow-pipe.

In testimony whereof I have hereunto signed my name in the presence ofthe two subscribed witnesses.

' H. G. SLINGLUFF.

Witnesses: J. O. BRADLEY,

.ARCHWORTH MARTIN.

copies ofthis fiatent maybe obtained for five cents' each, by addressingthe Commissioner of Patents, Washington, I). C.

